| Abbreviation | Definition |
|---|---|
| MWS | Modular Weapon System |
| MWS | Multiple Weapons System |
| MWSA | Military Writer's Society of America |
| MWSG | Marine Wing Support Group |
| MWSS | Manportable Weather Support System |
| MWTB | Mounted Warrior Test Bed (Ft Know) |
| MWTC | Mountain Warfare Training Center (USMC) |
| MWTP | Minsk Wheel Tractor Plant |
| MWTT | Master Weapons Training Team |
| MWV | Military Warfare Vehicle |
| MWY | Midway |
| MX | Mechanized |
| MX | Missile X (Next generation Ballistic Missile) |
| MX | Mothers Xylophone |
| MX | Multiplexer |
| MXI | Mark Eleven |
| MXS | Mixes |
| MXX | Mark Twenty |
| MY | Man Year |
| MYC | Military Youth Corps |